Generation of the organo-rare gas dications HCCRg2+ (Rg = Ar and Kr) in the reaction of acetylene dications with rare gases

2008 ◽  
Vol 10 (47) ◽  
pp. 7121 ◽  
Author(s):  
Daniela Ascenzi ◽  
Paolo Tosi ◽  
Jana Roithová ◽  
Claire L. Ricketts ◽  
Detlef Schröder ◽  
...  
Keyword(s):  
Rare Gas ◽  
Rare Gases

Ozone yields from the Febetron radiolysis of oxygen – rare gas mixtures

1977 ◽  
Vol 55 (2) ◽  
pp. 203-209 ◽  
Author(s):  
A. W. Boyd ◽  
O. A. Miller ◽  
E. B. Selkirk
Keyword(s):  
Excited State ◽  
Gas Mixtures ◽  
Rare Gas ◽  
Rare Gases

Ozone yields have been measured from the Febetron irradiation of mixtures containing 1–50 mol% oxygen and each of the five rare gases. The maximum values of G(O3) calculated using the energy absorbed only in the rare gas are obtained with the addition of less than 10% oxygen and are for: He, 16; Ne, 14; Ar, 11; Kr, 10; Xe, 12; each with an uncertainty of less than ±10%. On the addition of 0.2 mol% SF6 these yields are reduced to 6,5,1,2, and 2.5 respectively.These values are compared with those derived from ion and excited state yields and the contributions of subexcitation electrons.

Collision-induced absorption in ethane–rare gas mixtures

1983 ◽  
Vol 61 (4) ◽  
pp. 633-640 ◽  
Author(s):  
I. R. Dagg ◽  
L. A. A. Read ◽  
A. Anderson
Keyword(s):  
Fourier Transform ◽  
Temperature Dependence ◽  
Quadrupole Moment ◽  
Gas Mixtures ◽  
Rare Gas ◽  
Fourier Transform Spectrometer ◽  
Rare Gases ◽  
Induced Absorption ◽  
Absolute Value ◽  
The Absolute

The collision-induced spectra of mixtures of ethane and each of the rare gases He, Ar, Kr, and Xe in the 40–360 cm−1 region have been obtained using a Michelson Fourier transform spectrometer. In addition, the temperature dependence of the absorption in ethane and ethane–xenon mixtures is reported. All results have been analyzed according to the theory for quadrupole induced rotation–translation absorption. The absolute value of the quadrupole moment of ethane is estimated to be less than 1.0 B and most likely less than 0.5 B. Various speculations are made concerning the induction mechanisms (other than quadrupolar) for each of the mixtures.

Bonding of Rare-Gas Atoms to Si in Reactions of Rare Gases with SiF3+

2001 ◽  
Vol 105 (49) ◽  
pp. 11073-11079 ◽  
Author(s):  
A. Cunje ◽  
V. I. Baranov ◽  
Y. Ling ◽  
A. C. Hopkinson ◽  
D. K. Bohme
Keyword(s):  
Rare Gas ◽  
Rare Gases ◽  
Rare Gas Atoms

Uredelgase in einigen Steinmeteoriten

1960 ◽  
Vol 15 (7) ◽  
pp. 600-612 ◽  
Author(s):  
J. Zähringer ◽  
W. Gentner
Keyword(s):  
Large Deviations ◽  
Isotopic Composition ◽  
Gas Content ◽  
Rare Gas ◽  
Rare Gases

In the two chondrites Kapoeta and Abee outstanding rare gas content have been found. From the amount and isotopic composition it is concluded that primordial rare gases have been included in these meteorites. Kapoeta contains all rare gases in excess, while Abee has mainly the heavier rare gases as primordial component. The Ne20/Ne22—and A36/A38—ratios show large deviations from atmospheric Neon and Argon. No such large deviations could be found for Krypton and Xenon.

The Influence Of Matter And Black-Body Radiation Photons On The Dipole Polarizabilities A And γ Of Atoms

1996 ◽  
Vol 51 (7) ◽  
pp. 805-808 ◽  
Author(s):  
Uwe Hohm
Keyword(s):  
Reaction Rate ◽  
Black Body ◽  
Black Body Radiation ◽  
Rare Gas ◽  
Dipole Polarizability ◽  
Rare Gases ◽  
Reaction Rate Constants ◽  
Molecule Reaction ◽  
Rare Gas Atoms ◽  
Linear Dipole

Abstract The influence of the surroundings on the linear dipole polarizability α and second hyperpo-larizability γ is discussed in terms of the density ϱM of isotropically distributed matter as well as the density ϱp of thermal black-body radiation photons, α and γ of the rare gas atoms are studied as examples. At standard conditions, both effects are of comparable size for the rare gases. Possible consequences for ion-molecule reaction rate constants in astronomical environments are suggested.

Collision-induced microwave absorption in gaseous mixtures of various rare gases at 2.3 cm−1

1980 ◽  
Vol 58 (5) ◽  
pp. 633-641 ◽  
Author(s):  
I. R. Dagg ◽  
W. D. Leckie ◽  
L. A. A. Read
Keyword(s):  
Microwave Absorption ◽  
Room Temperature ◽  
Infrared Region ◽  
Exponential Model ◽  
Rare Gas ◽  
Rare Gases ◽  
Gaseous Mixtures ◽  
Induced Dipole ◽  
Upper Limits ◽  
Density Ratios

Collision-induced microwave absorption has been observed at 2.3 cm−1 for the rare gas mixtures Ne–Kr, Ar–Kr, Ar–Xe, and Kr–Xe. The absorption coefficient has been measured at room temperature for density products up to 8000 amagat2 and for various density ratios. These results have been used in conjunction with those of the infrared region to determine more accurately the zeroth moment for each of the spectra and hence have allowed improved values for the induced dipole moment parameters for the exponential model. Upper limits to the absorption in He–Xe and He–Ar mixtures in the microwave region have also been established.

Electron loss cross sections from rare gas atoms to Ar+

1982 ◽  
Vol 60 (7) ◽  
pp. 977-980
Author(s):  
B. Hird ◽  
S. P. Ali
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Energy Region ◽  
Rare Gas ◽  
Electron Loss ◽  
Rare Gases ◽  
Thin Target ◽  
Rare Gas Atoms ◽  
Good Agreement

Measurements of the σ10 cross section for a beam of Ar+ ions of energies between 30 and 120 keV passing through a thin target of the rare gases show good agreement with the few previous measurements in this energy region.

Depth of Origin of Secondary Ions: Suppression and Enhancement of Ions Upon Passage Through Overlayers.

1994 ◽  
Vol 354 ◽  
Author(s):  
N. J. Sack ◽  
M. Akbulut ◽  
T. E. Madey
Keyword(s):  
Solid Surfaces ◽  
Rare Gas ◽  
Rare Gases ◽  
Secondary Ions ◽  
Vacuum Interface ◽  
Rare Gas Atoms ◽  
Electron Stimulated Desorption ◽  
Energy And Angular Distributions ◽  
The Impact ◽  
Low Energy Ions

AbstractWe are investigating the transmission of low energy ions (<10 eV) through ultrathin films of condensed rare gases. Our goal is to address the issue of the depth of origin of secondary ions that desorb from solid surfaces under the impact of ionizing radiation, such as electrons, photons, or through ion sputtering. The secondary ions are produced by electron stimulated desorption (ESD) from a suitable substrate, such as an oxide or an adsórbate on a metal single crystal; the overlayer gas is condensed onto this substrate. The yield, energy and angular distributions of the ions are measured as a function of overlayer thickness. We find that 7 eV oxygen ions can be transmitted through rare gas films (Kr, Xe) several ML thick. In contrast, O+ is completely suppressed by 0.5 ML of H2O. Surprisingly, we find the F− yield to be 4 times higher in the presence of 1 ML of Xe, compared to the clean surface value, accompanied by a dramatic change in the ions’ angular distribution. We discuss a model which considers elastic scattering and charge transfer of the ions with rare gas atoms, as well as the structure of the surface and the electronic properties of the solid-vacuum interface.

Charged particle erosion of solid rare gases and dilute rare gas alloys

1982 ◽  
Vol 29 (2) ◽  
pp. 57-61 ◽  
Author(s):  
P. B�rgesen ◽  
J. Schou ◽  
H. S�rensen ◽  
C. Claussen
Keyword(s):  
Charged Particle ◽  
Rare Gas ◽  
Rare Gases ◽  
Particle Erosion

Mass Spectrometrical Study of Rare Gas Compositions and Neutron Capture Effects in Yamato-74191 (L 3) Chondrite

1980 ◽  
Vol 35 (1) ◽  
pp. 29-36
Author(s):  
Nobuo Takaoka ◽  
Keisuke Nagao
Keyword(s):  
Neutron Capture ◽  
Epithermal Neutron ◽  
Cosmic Ray ◽  
Rare Gas ◽  
Minimum Mass ◽  
Rare Gases ◽  
Slowing Down ◽  
Correlation Plot

Abstract The unequilibrated hypersthene chondrite Yamato-74191 was studied mass spectrometrically for rare gases released at various temperatures. Cosmogenic gases dominate in He and Ne. The meteorite contains large amounts of trapped Ar, Kr and Xe, and radiogenic 40Ar and 129Xe. Cosmic-ray irradiation and K-Ar ages were determined.In addition to spallogenic components of Kr and Xe, isotopic excesses of 80Kr, 82Kr, 128Xe and 126Xe relative to AVCC-Kr and -Xe were found. The ratio of 80Kr-excess to 82Kr-excess is 2.66 after correction for spallogenic Kr. A correlation between 128Xe/132Xe and 129Xe/132Xe was found The 129Xe/132Xe ratio for trapped Xe in Yamato-74191 was determined as 1.12 ± 0.29 with the correlation plot.The excesses found in Yamato-74191 are best explained by epithermal neutron capture on Br and I, and by the 127I (n, 2nβ) 126 Xe reaction. Using neutron-produced 80Kr, the neutron slowing -down density was estimated to be 0.14 ± 0.03 cm-3sec-1. A minimum mass and a preatmospheric radius was estimated to be 470 kg and 32 cm, respectively.

Sign in / Sign up

Export Citation Format

Share Document